闭式冷却塔空冷传热性能的试验研究及优化运行

搭建了扭曲管闭式冷却塔的换热实验平台,在空冷模式下通过测试在不同风机频率以及风机频率固定时不同的管内流体进口温度、空气干球温度情况下闭塔的传热性能、流动阻力和能耗,得到了风机频率、管程体积流量以及管程进口温度、环境温度对综合传热性能和空冷传热量的影响,进而得出优化闭塔空冷换热的方式,并推导出在不同的季节温度下最合理的运行方式。同时本试验拟合了风机频率和风机功率等与迎面风速的试验关联式以及空冷管外空气的传热系数试验关联式,对扭曲管式闭式冷却塔的优化设计有一定的指导作用。

Experimental Investigation of Heat Transfer and Energy-saving Operation of an Air-cooled Closed Circuit Cooling Tower

An experimental test platform is built up to for the twisted tube closed circuit cooling tower.The principal of this study is to investigate the influence of fan frequency,volume flow rate,the temperature of environment and tube-inside fluid on the total heat transfer performance and air-cooled heat transfer quantity by testing the heat transfer performance,resistance to flow and energy consumption at different fan-frequency,inlet temperature of process water and air dry ball temperature in the air-cooled mode,then get the method to optimize the heat transfer in air-cooled Closed Circuit Cooling Tower,to obtaine the most reasonable working mode interface different temperature.This experiment also fit out the experimental correlation of fan-frequency,fan-power with the face velocity as well as the experimental heat transfer coefficient correlations of the air outside the tube,and this correlation will be referred in optimal design for twisted-tube closed circuit cooling towers.